d = {
	"love" : "tinh yeu",
	"sky" : "bau troi"
	}
print "Dictionary"
def tra_tu():
	tu = raw_input("Nhap tu muon tra:\n")
	if str(tu) in d:
		print d[str(tu)]
	else:
		print "Khong co tu nay trong tu dien."
		nghia = raw_input("Vui long dinh nghia: ")
		d[tu]=str(nghia)
tra_tu()
def batdau():
		Q = raw_input("Ban co muon tiep tuc? (Y/N): ")
		if (Q == "Y" or Q == "y" ):
			tra_tu()
			batdau()
		elif (Q == "N" or Q == "n" ):
			print "Good Bye"
			exit
		else :
			batdau()
batdau()